The airways said nearly 100% of the fights were cancelled due to the strike which disrupted thousands of travellers' plans in unprecedented industrial action over a pay dispute.

The strike was called for by the British Airline Pilots Association (BALPA) amid a heated dispute over pay with the airline. BALPA said Sunday on Twitter that it put forward a proposal to the carrier's management Wednesday, but had yet to receive a reply.

We put forward a proposal to BA management last Wednesday that would have enabled us to call off the strikes for Monday and Tuesday.

Following the strikes on Sept. 9 and 10, another day of industrial action is scheduled for Sept. 27.

“We understand the frustration and the disruption BALPA’s strike action has caused our customers. After many months of trying to resolve the pay dispute, we are extremely sorry that it has come to this. We remain ready and willing to return to talks with BALPA,” BA said in a statement.

BALPA has said that BA should share more of its profits with its pilots. BA has said the strike action is unjustifiable as its pay offer was fair.

Thousands of customers have had to seek alternative travel arrangements, and the airline has come in for criticism over how it handled communications with passengers ahead of the strikes.

“This strike will have cost the company considerably more than the investment needed to settle this dispute,” BALPA General Secretary Brian Strutton said in a statement on the eve of the strike.

“It is time to get back to the negotiating table and put together a serious offer that will end this dispute.”

Last Thursday, the airline dismissed a new offer by BALPA as an “eleventh hour inflated proposal” that was not made in good faith. BALPA had said it would have called off the strikes this week if BA had engaged with the offer. A spokeswoman for Prime Minister Boris Johnson has urged both sides to end the dispute.

Asked about the strike action, a spokeswoman for British Airways said: “We remain ready and willing to return to talks with BALPA.” The UK Civil Aviation Authority (CAA) is investigating the airline after it enraged some travellers by wrongly telling them their flights had been cancelled.